The  Agilent 8168F tunable laser generates +8 dBm signal power when no attenuator is included, or +7 dBm with an attenuator. tunable laser source has a built-in isolator The typical accuracy of a wavelength step generated by the HP 8168F is typically ±0.001 nm, resulting in good accuracy for PMD values up to approximately 2 ps. The Agilent 8168F, Tunable Laser Sources are basic tools for characterizing and testing optical amplifiers and components. The Agilent 8168F Tunable Laser Source addresses the 1450-1590nm wavelength range. A built-in side mode filter ensures that a true single-mode laser line is generated for every wavelength point, eliminating any possible multimoding.